Method carried out by sensor controller and sensor controller
AssigneeWacom Co., Ltd.
InventorAkira Ito
Life of this patent
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Abstract
A method is carried out by a sensor controller for detecting an electromagnetic resonance stylus using an electromagnetic resonance sensor. The method includes, upon elapse of a predetermined period after the electromagnetic resonance sensor has stopped transmitting a feeder alternating magnetic field for feeding electric power to the electromagnetic resonance stylus, transmitting, from the electromagnetic resonance sensor, a cancelling alternating magnetic field that oscillates in a phase that cancels residual resonance in the electromagnetic resonance stylus.
Claims15
A method carried out by a sensor controller for detecting an electromagnetic resonance stylus using an electromagnetic resonance sensor, the method comprising:
- upon elapse of a predetermined period after the electromagnetic resonance sensor has stopped transmitting a feeder alternating magnetic field for feeding electric power to the electromagnetic resonance stylus, transmitting, from the electromagnetic resonance sensor, a cancelling alternating magnetic field that oscillates in a phase that cancels residual resonance of the electromagnetic resonance stylus,
- wherein, after the electromagnetic resonance sensor has transmitted the cancelling alternating magnetic field, the electromagnetic resonance sensor transmits the feeder alternating magnetic field again, and
- wherein the electromagnetic resonance sensor transmits the cancelling alternating magnetic field and then the feeder alternating magnetic field in succession.
A sensor controller for detecting an electromagnetic resonance stylus using an electromagnetic resonance sensor,
- wherein the electromagnetic resonance sensor, upon elapse of a predetermined period after the electromagnetic resonance sensor has stopped transmitting a feeder alternating magnetic field for feeding electric power to the electromagnetic resonance stylus, transmits a cancelling alternating magnetic field that oscillates in a phase that cancels residual resonance in the electromagnetic resonance stylus,
- wherein, after the electromagnetic resonance sensor has transmitted the cancelling alternating magnetic field, the electromagnetic resonance sensor transmits the feeder alternating magnetic field again, and
- wherein the electromagnetic resonance sensor transmits the cancelling alternating magnetic field and then the feeder alternating magnetic field in succession.
Dependencies are inferred from the claim text.